Professional skateboarder Tony Hawk will join Sprinkles Cupcakes founder Candace Nelson to help support The Tony Hawk Foundation, which focuses on the creation of public skateboard parks in low-income communities. Nelson and Hawk will be handing out cupcakes at the La Jolla Sprinkles from 1 to 3 p.m. on Sept. 21. Hawk’s favorite cupcake is the Cinnamon Sugar, and 100 percent of the cupcake’s weekend sales from all 10 Sprinkles stores will be donated to the foundation.